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Pope Francis celebrates Mass at Rio de Janeiro's Cathedral, Saturday, July 27, 2013. Pope Francis on Saturday challenged bishops from around the world to get out of their churches and preach, and to have the courage to go to the farthest margins of society to find the faithful.. Pope Francis is on the sixth day of his trip to Brazil where he attends the 2013 World Youth Day in Rio. (AP Photo/Domenico Stinellis)
/ AP